[#ftl]
[#list tables as table]
ALTER TABLE ${table.name} COMMENT='${table.comment}';
    [#list table.feilds as feild]
        ALTER TABLE ${table.name} MODIFY COLUMN ${(feild.name!)?lower_case} ${feild.type} DEFAULT NULL NULL COMMENT '${feild.comment}';
    [/#list]
[/#list]
